LCD Self-Screen Drive Mode Reducing Power Consumption
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Solution Overview
Problem
Large-sized and high-definition liquid crystal displays consume excessive power, leading to unattractive appearances when not in use and increased energy costs, especially when mounted in home or office environments.
Innovation Solution
A liquid crystal display system that includes a self-screen drive mode, utilizing a microprocessor to generate a dimming signal and internal timing signals to reduce backlight luminance, along with an illuminance sensing unit to adjust power consumption based on external light levels, allowing for low power operation and attractive appearance when not in use.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the liquid crystal display operates in normal drive mode with full backlight luminance, then the display provides adequate visibility and image quality, but power consumption increases significantly
Solution Approach 1:
The patent implements dynamic backlight luminance adjustment by switching between normal drive mode and self-screen drive mode. The backlight luminance is dynamically adapted to ambient lighting conditions and usage scenarios, allowing the display to maintain adequate visibility while significantly reducing power consumption when full brightness is not required.
Solution Approach 2:
The patent changes the backlight luminance parameter based on operating mode. In self-screen drive mode, the backlight luminance is reduced to a lower level compared to normal drive mode, enabling power savings while maintaining sufficient visibility for basic display functions.
2Use of energy by moving object
If the liquid crystal display reduces backlight luminance to save power, then power consumption decreases, but visibility and attractiveness when not in use deteriorate
Solution Approach 1:
The patent dynamically adjusts display behavior based on operational context. In self-screen drive mode, the display maintains reduced backlight luminance for power savings during normal operation, but can transition to normal drive mode when external video signals are input, ensuring visibility and attractiveness are maintained when needed while achieving power savings during static display periods.
Solution Approach 2:
The display system serves multiple functions through a single unified architecture that handles both normal drive mode and self-screen drive mode. The same liquid crystal display panel and control circuitry accommodate both full-brightness operation for visibility and reduced-brightness operation for power savings, making the system adaptable to different usage scenarios.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Significantly reduces power consumption to 10% of normal drive levels, maintaining visibility and attractiveness, contributing to an interior design-friendly solution.
Implementation Method 1
Liquid crystal displays (LCDs) display an image by controlling light transmittance of a liquid crystal layer with an electric field in response to a video signal
Implementation Method 2
controlling light transmittance of a liquid crystal layer with an electric field
Implementation Method 3
a thin-film transistor (TFT) is used in the switching element of the active-matrix type liquid crystal display
Data Source
AI summary
A liquid crystal display (LCD) and a method of driving the same are disclosed. The liquid crystal display includes a liquid crystal display panel; a backlight unit; a panel drive circuit; a timing controller; an internal memory; a self-screen drive controller; a scaler unit; a selection unit; an internal power circuit; an external power circuit; and a microprocessor that blocks an output of the external power circuit from being supplied to the scaler unit in a self-screen drive.